Role of floral organ identity genes in the development of unisexual flowers of Quercus suber L.

被引:20
作者
Sobral, Romulo [1 ]
Costa, M. Manuela R. [1 ]
机构
[1] Univ Minho, Plant Funct Biol Ctr, Biosyst & Integrat Sci Inst BioISI, Campus Gualtar, P-4710057 Braga, Portugal
关键词
MADS-BOX GENES; ECTOPIC EXPRESSION; ARABIDOPSIS-THALIANA; PROTEIN INTERACTIONS; FUNCTIONAL ANALYSES; AGAMOUS SUBFAMILY; HOMEOTIC PROTEINS; DOMAIN PROTEINS; EVOLUTION; DIVERSIFICATION;
D O I
10.1038/s41598-017-10732-0
中图分类号
O [数理科学和化学]; P [天文学、地球科学]; Q [生物科学]; N [自然科学总论];
学科分类号
07 ; 0710 ; 09 ;
摘要
Monoecious species provide an excellent system to study the specific determinants that underlie male and female flower development. Quercus suber is a monoecious species with unisexual flowers at inception. Despite the overall importance of this and other tree species with a similar reproductive habit, little is known regarding the mechanisms involved in the development of their male and female flowers. Here, we have characterised members of the ABCDE MADS-box gene family of Q. suber. The temporal expression of these genes was found to be sex-biased. The B-class genes, in particular, are predominantly, or exclusively (in the case of QsPISTILLATA), expressed in the male flowers. Functional analysis in Arabidopsis suggests that the B-class genes have their function conserved. The identification of sex-biased gene expression plus the identification of unusual protein-protein interactions suggest that the floral organ identity of Q. suber may be under control of specific changes in the dynamics of the ABCDE model. This study constitutes a major step towards the characterisation of the mechanisms involved in reproductive organ identity in a monoecious tree with a potential contribution towards the knowledge of conserved developmental mechanisms in other species with a similar sex habit.
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页数:15
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